SJ301 is a type of Si and Ca based agglomerated flux,the basicity of which is about 1.0(neutral), black gray spherical grains in appearance. Its grain size is 2.0-0.28mm(10-60meshes).SJ301 is suitable for use with AC or DC power, filler wires connect with positive electrode while in DC, the current can reach up to 1200 amps. With stable burning arc, the flux provides good weld bead appearance and excellent slag removal.The nature of the molten slag is "short slag". SJ301 is perfect for circular seam welding as a result of there is no molten slag fluxing down when welding circular seam of small diameter. z